fix zk verify
diff --git a/src/mta.c b/src/mta.c
index ca7e1df..c8fba17 100644
--- a/src/mta.c
+++ b/src/mta.c
@@ -938,7 +938,7 @@
 
     fail = (FF_2048_comp(p_gt, p_proof, HFLEN_2048) != 0) || (FF_2048_comp(q_gt, q_proof, HFLEN_2048) != 0);
 
-    if (fail);
+    if (fail)
     {
         // Clean memory
         FF_2048_zero(p_gt, HFLEN_2048);